Flight unit control system, flight control device including such a system, and use of such a system
First Claim
1. A flight unit control system, comprising at least one instrumented fastening bolt connecting an aircraft carrier structure and a load path, the at least one instrumented bolt having at least one measurement area for detecting that the load path is under load, the system comprising fastening means for locking the at least one instrumented bolt in position relative to the aircraft carrier structure and to the load path without stressing the at least one instrumented bolt in the at least one measurement area, neither in tension nor in torsion, wherein the at least one measurement area of the at least one instrumented bolt includes:
- two cavities which are opposite each other in relation to an axis and separated from each other along a transverse axis by a thin wall that is deformed under a shear stress applied to the at least one instrumented bolt, andat least one strain gauge which is placed in a bottom of one of the cavities against the thin wall, the at least one strain gauge detecting a deformation of the thin wall,and in that the fastening means includes;
a fastening plate which is positioned at a threaded end of the at least one instrumented bolt, bearing against one of the aircraft carrier structure and the load path, and which extends perpendicularly to the axis of the at least one instrumented bolt, anda nut which is placed on the threaded end of the at least one instrumented bolt and immobilizes the at least one instrumented bolt relative to the one of the aircraft carrier structure and the load path against which the fastening plate bears.
3 Assignments
0 Petitions
Accused Products
Abstract
A flight unit control system having at least one instrumented fastening bolt connecting an aircraft carrier structure and a load path, the instrumented bolt having at least one measurement area for detecting that the load path is under load and including a fastener for locking the instrumented bolt in a position relative to the aircraft carrier structure and load path and wherein the measurement area has two cavities and at least one strain gauge and wherein the fastener includes a plate which is positioned at a threaded end of the instrumented bolt which bears against one of the aircraft carrier structure and the load path and which extends perpendicularly to an axis of the bolt and a nut which is placed at the threaded end of the instrumented bolt to immobilize the instrumented bolt relative to the aircraft structure or the load path.
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Citations
16 Claims
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1. A flight unit control system, comprising at least one instrumented fastening bolt connecting an aircraft carrier structure and a load path, the at least one instrumented bolt having at least one measurement area for detecting that the load path is under load, the system comprising fastening means for locking the at least one instrumented bolt in position relative to the aircraft carrier structure and to the load path without stressing the at least one instrumented bolt in the at least one measurement area, neither in tension nor in torsion, wherein the at least one measurement area of the at least one instrumented bolt includes:
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two cavities which are opposite each other in relation to an axis and separated from each other along a transverse axis by a thin wall that is deformed under a shear stress applied to the at least one instrumented bolt, and at least one strain gauge which is placed in a bottom of one of the cavities against the thin wall, the at least one strain gauge detecting a deformation of the thin wall, and in that the fastening means includes; a fastening plate which is positioned at a threaded end of the at least one instrumented bolt, bearing against one of the aircraft carrier structure and the load path, and which extends perpendicularly to the axis of the at least one instrumented bolt, and a nut which is placed on the threaded end of the at least one instrumented bolt and immobilizes the at least one instrumented bolt relative to the one of the aircraft carrier structure and the load path against which the fastening plate bears. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
and wherein the secondary load path includes a flight unit control system according to claim 1.
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16. Use of a flight unit control system according to claim 1 for replacing a pre-existing system which equips a secondary load path based on an attachment of a flight control actuator, to replace a pre-existing fastening bolt connecting an aircraft carrier structure and the secondary load path with the at least one instrumented fastening bolt, without modifying an attachment of the flight control actuator.
Specification